This LED wireless speaker features compact and lightweight design with lanyard. It delivers big sound with deep bass for its compact size. This speaker has easy connectivity with wireless compatibility, AUX-IN jack, TF card slot and U disk slot, plus easy and quick switch between modes. Once the speaker is powered on, the LED light flashes instantly and flickers with music when playing. With built-in speakerphone and mic, you can easily take phone calls out loud with clear sound 10 meters away from your smartphone. Besides, this LED wireless speaker can play unplugged for hours and be charged from most USB power sources.Big sound with deep bassWireless and ultra-compact with lanyard Easy connectivity with wireless compatibility Colorful LED lighting flickers with the music Convenient call control with built-in speakerphone and mic Supports line-in, TF card and U disk Charges with most USB power sourcesOutput Power - 3WInput Power - DC 5V/1000mA Battery - 5V 400mAh/ 16.5gSpeaker - 4Ω3WFrequency - 100HZ-20KHZTransmission Distance - 10mDistortion - 1%w 1KHz S/N - ≥85dBRuntime - 2-3 hours Charging Time - 1-2 hoursAvailable Colors - red, blue, black, white1×Wireless Speaker - Red1×Audio Cable 1×USB Charging Cable 1×User Manual